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Certificates: Other Gas
| Code | Description | Type | Expiration date | |
| D354052 | 30 PPM H2S * 2,5 % CH4 * 17 % O2 * 100 PPM CO | GX |  |
03/12/2011 | D808552 | 30 PPM H2S * 2,5 % CH4 * 17 % O2 * 100 PPM CO | GX | |
12/05/2012 | D979053 | 30 PPM H2S * 2,5 % CH4 * 17 % O2 * 100 PPM CO | GX | |
17/08/2013 |